[2] He also earned four caps with the Belgium national American football team, including a game against Poland two days after his 16th birthday.

[4][5][6] In 2016, Debaillie was discovered by Europe’s Elite, an organization co-founded by former pro player Brandon Collier that connects talented European prospects with American college coaches.

[7][8] He took a trip to America that summer, visiting Penn State, Maryland, Towson, Albany and UMass as Europe's Elite's first ever representative.

[1] In 2019, he started nine games on the defensive line, recording a career-high nine tackles against The Citadel as well as an assisted sack of Kyle Trask against #9 Florida.

[16][17] He was elevated to the active roster again for their week 13 loss to the Hamilton Tiger-Cats, where he recorded his first career defensive tackle,[18] before being reverted back to the practice squad.

[22] As a pending free agent, Debaillie re-signed with the Lions on January 30, 2024, to a one-year contract extension.